Thermal Environment for Polar Communications and Weather System in the Telesat-Tundra Orbit
Bibliographic record
Abstract
This thesis examines the thermal environment and control system for the Polar Communications and Weather (PCW) satellite system as proposed by Telesat.The Telesat-PCW will use a unique orbit, based on the Tundra orbit to provide continuous meteorological and communications coverage to the Arctic region.The Telesat Tundra Orbit (TTO) was selected as it can meet the mission requirements using systems designed for Geostationary Orbits (GEO), a mature and robust field.However, the unique combination of communications and meteorological payloads, coupled with a previously unused orbit, presents an unexamined thermal design scenario.Using an existing geostationary satellite design for PCW would significantly reduce costs.This thesis describes the spacecraft thermal environment of the TTO, compares it to the thermal environment of the geostationary orbit, and numerically analyzes the suitability of a typical geostationary satellite thermal design system for PCW by using a Thermal Mathematical Model (TMM).The analysis shows that a thermal control system for a typical GEO communications satellite can sufficiently regulate PCW spacecraft temperatures in the TTO.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".